<input type="text" name="wenben" value="http://www.baidu.com http://www.baidu.com" />
<input type="button" value="点击" onClick="go();" />
<script>
function go(){
if(document.getElementById("wenben").value.length>0)
location.href=document.getElementById("wenben").value;
else
return false;
}
</script>