// JavaScript Document

	function checkForm(form1)
	{

		var t1 = form1.t1.value;
		var t3 = form1.t3.value;
		var t4 = form1.t4.value;
		var t7 = form1.t7.value;
		var t8 = form1.t8.value;
	
		if ( t1 == "" || t1 == null )
		{
			alert("用户名称不能为空");
			form1.t1.focus();
			return false;
		}
		
		if ( t3 == "" || t3 == null )
		{
			alert("联系人不能为空");
			form1.t3.focus();
			return false;
		}
		
		if ( t4 == "" || t4 == null )
		{
			alert("联系电话不能为空");
			form1.t4.focus();
			return false;
		}
		
		if ( t7 == "" || t7 == null )
		{
			alert("反馈主题不能为空");
			form1.t7.focus();
			return false;
		}
		
		if ( t8 == "" || t8 == null )
		{
			alert("反馈内容不能为空");
			form1.t8.focus();
			return false;
		}
		
		//-----------------------
	}