function check_value(k,UorA)	  {
		
		WertA =eval("document.frmMain.ib"+UorA+"GJ"+k+".value");
		
		if (UorA == "U")      {
		   BezA = "net sales";
		}
		if (UorA == "A")      {
		   BezA = "operating costs";
		}				

		if (WertA == "")	  {
		   alert("Please enter the "+BezA+" for the "+k+". year.");
		   return false;
		}
		
		if(isNaN(WertA) == true)	  {
		   alert(BezA+" for the "+k+". year is not a valid input.");
		   return false;
		}
		return true;
}

function check()        {
        


		
		if (document.frmMain.branche.value < 0)					   {
		   alert("Please choose a sector.");
		   return false;
		}
		
		if (check_phase() != true)	   {
		   alert("Please select the financing stage of your company.");
		   return false;
		}
		
		
		if (document.frmMain.currency.value == "0")					   {
		   alert("Please select a currency.");
		   return false;
		}		
		
		if (check_umsatz() != true)		{
		   return false;
		}
		
		if (check_aufwendungen() != true)		{
		   return false;
		}
		
		if (document.frmMain.titel.value == "0")					   {
		   alert("Please select a title (personal information).");
		   return false;
		}			
		
        if (document.frmMain.name.value == "" ){
            alert("Please enter your last name.");
            return false;
        }
		
        if (document.frmMain.fname.value == "" ){
            alert("Please enter your first name.");
            return false;
        }
			
        if (document.frmMain.firma.value == "" ){
            alert("Please enter the name of your company.");
            return false;
        }
				
        if (document.frmMain.land.selectedIndex <= 0 ){
                        alert("Please choose a country.");
                        return false;
        }
		
        ad = document.frmMain.email.value
        if (ad == ""){
            alert("Please enter your e-mail adress.");
            return false;
        }
        if (ad.indexOf("@") == -1 || ad.indexOf(".") == -1){
            alert("The entered e-mail adress is not valid.");
            return false;
        }
		
        return true;
}