var language='';
function changeClassProperty(classname,prop,val)
{
  var rules,docstyle=document.styleSheets.item(0);
  for (j=0;j<document.styleSheets.length;j++){
  docstyle=document.styleSheets.item(j);
  if(docstyle.rules)rules=docstyle.rules;
  if(docstyle.cssRules)rules=docstyle.cssRules;
  var rl=rules.length;
var s ="";
  for(var i=0;i<rl;i++)
  {
	s +=";" +rules.item(i).selectorText.toLowerCase();
    if(rules.item(i).selectorText.toLowerCase()=="."+classname.toLowerCase()){ rules.item(i).style[prop]=val;}
  }
  }

}
function bmi_compute(){
		var k=document.getElementById("bmi_kilo").value;
		var g=0.01*document.getElementById("bmi_groesse").value;
		if (isNaN(g) || g<1.45){document.getElementById("bmi_groesse").value='145';g=1.45;}
		if (g>1.95){document.getElementById("bmi_groesse").value='195';g=1.95;}
		var bmi=Math.round(k/(g*g));
		document.getElementById("bmi_value").innerHTML=bmi;
}