<public:component>
<public:attach event="onblur" onevent="itemOnBlur()" />
<public:attach event="onkeypress" onevent="keypress()" />
<public:attach event="onbeforepaste" onevent="beforePaste()" />

<public:method name="validate">

<script language="javascript">
function validate() {
	if (element.value.length==0) return true;
	if(isNaN(element.value)) {
		alert("错误的数字格式!");
		element.value="";
		element.focus();
		return false;
	}
	return true;
}

function  itemOnBlur(){
	validate();
}


function keypress() {
	if ( !((window.event.keyCode >= 48) && (window.event.keyCode <= 57)
		|| window.event.keyCode==43 || window.event.keyCode==45 || window.event.keyCode==46)) 
	{
		window.event.keyCode = 0 ;
	}
}

function beforePaste() {
	clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''));
}
</script>
</public:component>