function moveDIV( var1, var2, div ) {
	if ( var1 == 0 ) {
		document.getElementById(div).style.left = "0px";
		document.getElementById(div).style.top = "0px";
	} else {
		if ( var2 ) {
			/* alter Wert ohne Einheit */
			var2 = document.getElementById(div).style.left;
			var2 = Number(var2.substring(0, var2.length-2));
			var3 = document.getElementById(div).style.width;
			var3 = Number(var3.substring(0, var3.length-2));
			var4 = document.getElementById("tool").style.width;
			var4 = Number(var4.substring(0, var4.length-2));
			// wenn links am rand angekommen
			if ( var2 + var1 <= 0 ) {
				if ( var2 + var1 > -var3 + var4 ) {
					document.getElementById(div).style.left = var2 + var1 + "px";
				} else {
					document.getElementById(div).style.left = -var3 + var4 + "px";
				}
			}
		} else {
			/* alter Wert ohne Einheit */
			var2 = document.getElementById(div).style.top;
			var2 = Number(var2.substring(0, var2.length-2));
			// wenn links am rand angekommen
			if ( var2 + var1 <= 0 )	{
				document.getElementById(div).style.top = var2 + var1 + "px";
			}
		}
	}
}