function enter_val(e)
{
    if(e.value == 'кол-во')
     {
     	e.value = '';
     	e.style.background = "#FFFFFF";
     };
}

function out_val(e)
{
    if(e.value == '' )
     {
     	e.value = 'кол-во';
     };
   	e.style.background = "transparent";
}