Uno de los elementos mas utilizados en los blogs es, probablemente, el cuadro de busqueda. Si un usuario quiere encontrar cualquier articulo o tema en tu blog, aparte de las etiquetas, lo mas sencillo es indicarlo en la barra y darle al boton de buscar. Por eso, lo mas logico es que la tengas a la vista y si tiene un diseño guapo como esta (diseñada con CSS3) pues mucho mejor. Para añadirla en tu blog de Blogger, tan solo tienes que copiar el codigo de abajo y pegarlo en un Gadget HTML/Javascript. Cambias lo que esta indicado en rojo por la direccion de tu blog y listo.
CODIGO:
<form class="form-wrapper" action='http://nombredetublog.blogspot.com/search' method='get'><input id="search" type="search" placeholder="buscar en el blog ..."required name="q" /><button id="submit" type="submit">buscar</button></form>
<style>
.form-wrapper {
width: 450px;
padding: 8px;
margin: 100px auto;
overflow: hidden;
border-width: 1px;
border-style: solid;
border-color: #dedede #bababa #aaa #bababa;
-moz-box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
-webkit-box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
background-color: #f6f6f6;
background-image: -webkit-gradient(linear, left top, left bottom, from(#f6f6f6), to(#eae8e8));
background-image: -webkit-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: -moz-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: -ms-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: -o-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: linear-gradient(top, #f6f6f6, #eae8e8);
}
.form-wrapper #search {
width: 330px;
height: 20px;
padding: 10px 5px;
float: left;
font: bold 16px 'lucida sans', 'trebuchet MS', 'Tahoma';
border: 1px solid #ccc;
-moz-box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
-webkit-box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px;
}
.form-wrapper #search:focus {
outline: 0;
border-color: #aaa;
-moz-box-shadow: 0 1px 1px #bbb inset;
-webkit-box-shadow: 0 1px 1px #bbb inset;
box-shadow: 0 1px 1px #bbb inset;
}
.form-wrapper #search::-webkit-input-placeholder {
color: #999;
font-weight: normal;
}
.form-wrapper #search:-moz-placeholder {
color: #999;
font-weight: normal;
}
.form-wrapper #search:-ms-input-placeholder {
color: #999;
font-weight: normal;
}
.form-wrapper #submit {
float: right;
border: 1px solid #00748f;
height: 42px;
width: 100px;
padding: 0;
cursor: pointer;
font: bold 15px Arial, Helvetica;
color: #fafafa;
text-transform: uppercase;
background-color: #0483a0;
background-image: -webkit-gradient(linear, left top, left bottom, from(#31b2c3), to(#0483a0));
background-image: -webkit-linear-gradient(top, #31b2c3, #0483a0);
background-image: -moz-linear-gradient(top, #31b2c3, #0483a0);
background-image: -ms-linear-gradient(top, #31b2c3, #0483a0);
background-image: -o-linear-gradient(top, #31b2c3, #0483a0);
background-image: linear-gradient(top, #31b2c3, #0483a0);
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px;
text-shadow: 0 1px 0 rgba(0, 0 ,0, .3);
-moz-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
-webkit-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
}
.form-wrapper #submit:hover,
.form-wrapper #submit:focus {
background-color: #31b2c3;
background-image: -webkit-gradient(linear, left top, left bottom, from(#0483a0), to(#31b2c3));
background-image: -webkit-linear-gradient(top, #0483a0, #31b2c3);
background-image: -moz-linear-gradient(top, #0483a0, #31b2c3);
background-image: -ms-linear-gradient(top, #0483a0, #31b2c3);
background-image: -o-linear-gradient(top, #0483a0, #31b2c3);
background-image: linear-gradient(top, #0483a0, #31b2c3);
}
.form-wrapper #submit:active {
outline: 0;
-moz-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
-webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
}
.form-wrapper #submit::-moz-focus-inner {
border: 0;
}
</style>
<style>
.form-wrapper {
width: 450px;
padding: 8px;
margin: 100px auto;
overflow: hidden;
border-width: 1px;
border-style: solid;
border-color: #dedede #bababa #aaa #bababa;
-moz-box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
-webkit-box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
background-color: #f6f6f6;
background-image: -webkit-gradient(linear, left top, left bottom, from(#f6f6f6), to(#eae8e8));
background-image: -webkit-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: -moz-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: -ms-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: -o-linear-gradient(top, #f6f6f6, #eae8e8);
background-image: linear-gradient(top, #f6f6f6, #eae8e8);
}
.form-wrapper #search {
width: 330px;
height: 20px;
padding: 10px 5px;
float: left;
font: bold 16px 'lucida sans', 'trebuchet MS', 'Tahoma';
border: 1px solid #ccc;
-moz-box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
-webkit-box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px;
}
.form-wrapper #search:focus {
outline: 0;
border-color: #aaa;
-moz-box-shadow: 0 1px 1px #bbb inset;
-webkit-box-shadow: 0 1px 1px #bbb inset;
box-shadow: 0 1px 1px #bbb inset;
}
.form-wrapper #search::-webkit-input-placeholder {
color: #999;
font-weight: normal;
}
.form-wrapper #search:-moz-placeholder {
color: #999;
font-weight: normal;
}
.form-wrapper #search:-ms-input-placeholder {
color: #999;
font-weight: normal;
}
.form-wrapper #submit {
float: right;
border: 1px solid #00748f;
height: 42px;
width: 100px;
padding: 0;
cursor: pointer;
font: bold 15px Arial, Helvetica;
color: #fafafa;
text-transform: uppercase;
background-color: #0483a0;
background-image: -webkit-gradient(linear, left top, left bottom, from(#31b2c3), to(#0483a0));
background-image: -webkit-linear-gradient(top, #31b2c3, #0483a0);
background-image: -moz-linear-gradient(top, #31b2c3, #0483a0);
background-image: -ms-linear-gradient(top, #31b2c3, #0483a0);
background-image: -o-linear-gradient(top, #31b2c3, #0483a0);
background-image: linear-gradient(top, #31b2c3, #0483a0);
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px;
text-shadow: 0 1px 0 rgba(0, 0 ,0, .3);
-moz-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
-webkit-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
}
.form-wrapper #submit:hover,
.form-wrapper #submit:focus {
background-color: #31b2c3;
background-image: -webkit-gradient(linear, left top, left bottom, from(#0483a0), to(#31b2c3));
background-image: -webkit-linear-gradient(top, #0483a0, #31b2c3);
background-image: -moz-linear-gradient(top, #0483a0, #31b2c3);
background-image: -ms-linear-gradient(top, #0483a0, #31b2c3);
background-image: -o-linear-gradient(top, #0483a0, #31b2c3);
background-image: linear-gradient(top, #0483a0, #31b2c3);
}
.form-wrapper #submit:active {
outline: 0;
-moz-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
-webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
}
.form-wrapper #submit::-moz-focus-inner {
border: 0;
}
</style>