function CheckLen(Target)
{
var maxlength = "300";

StrLen=Target.value.length;

if (StrLen==1&&Target.value.substring(0,1)==" ")
{
Target.value="";
StrLen=0;
}
if (StrLen>maxlength )
{
Target.value=Target.value.substring(0,maxlength);
CharsLeft=0;
}else
{
CharsLeft=maxlength-StrLen;
}
document.zaehler.Anzahl.value=CharsLeft;
}