<public:component>
<public:attach event="onblur" onevent="itemOnBlur()" />

<public:method name="validate">

<script language="javascript">
function validate() {
	if (element.value.length==0) return true;
	var pat = /(^0{0,1}13[0-9]|15[0-9]|18[0-9]{9}$)/;
	var ret = pat.exec(element.value);
    	if(!ret) {
    		alert("错误的手机号码格式!");
    		element.value="";
    		element.focus();
    		return false;
    	}
    	return true;
}

function  itemOnBlur(){
	validate();
}
</script>
</public:component>