<input type="text" name="q" value="请输入关键字"
style="width:128px; height:20px; background:#d7d7d7;
border:0px; padding:0px 5px; line-height:20px;"
onfocus="if(this.value=='请输入关键字')this.value='';"
onblur="if(this.value=='')this.value='请输入关键字';"
/>
<script type="text/javascript"> | |
function shaofeng() | |
{ | |
var q=document.getElementById("q").value; | |
if(q==""||q==null||q=='请输入关键字') | |
{ | |
alert("搜索内容不能为空!"); | |
return false; | |
}else{ | |
return true; | |
} | |
} | |
</script> |