function CheckInput()
    {
        
        frm = document.getElementById("form1");
        
        if (frm.name.value == '')
        {
            alert("please input your name");
            frm.name.focus();
            return false;
        }
		
		if (frm.company.value == '')
        {
            alert("please input your company name");
            frm.company.focus();
            return false;
        }
        
		if (frm.phone.value == '')
        {
            alert("please input your phone");
            frm.phone.focus();
            return false;
        }
		
        if (frm.email.value == '')
        {
            alert("please input your e-mail");
            frm.email.focus();
            return false;
        }
		if(checkMail(frm.email.value)==false) 
		{ 
			alert("error e-mail address"); 
			frm.email.focus(); 
			return false; 
		}
		
		if (frm.dwidth.value == '' && frm.dheight.value == '')
        {
            alert("please input width or height");
			frm.dwidth.focus();
            return false;
        }
        
        if (frm.comments.value == '')
        {
            alert("please input comments");
            frm.comments.focus();
            return false;
        }
        
        if (frm.upfile.value == '')
        {
            alert("please select your file");
            frm.upfile.focus();
            return false;
        }
        
        frm.cmdConfirm.value="1";
        
        frm.submit();
        
        return false;
    }
	
	function checkMail(a) 
	{ 
		var pattern=/\w+@\w+\.[a-z]+/; 
		if(pattern.test(a)) 
		{ 
			return true; 
		} 
		else 
		{ 
			return false; 
		} 
	}