function fucCheckNUM(NUM)
{
	var i,j,strTemp;
	strTemp="0123456789";
	if ( NUM.length== 0)
		return 0
	for (i=0;i<NUM.length;i++)
	{
		j=strTemp.indexOf(NUM.charAt(i));	
		if (j==-1)
		{
		//说明有字符不是数字
			return 0;
		}
	}
	//说明是数字
	return 1;
}

function checknum(theInput) 
{
 	if ((fucCheckNUM(theInput.value)==0) )
	{	
	   theInput.value="";
		//theform.newprice.focus();
		return false;
	}
}

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