<!--


function  isNumb(passStr) {
 	var regEx  =  /(^-?\d\d*\.\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)/; 
 	return regEx.test(passStr);
}


function gearspeedo() {
	
	document.forms.speed.nsp.value = ""
	
	for (cnt=0; cnt < document.forms.speed.elements.length; cnt++) {
		if (!isNumb(document.forms.speed.elements[cnt].value.toString()) && document.forms.speed.elements[cnt].type == "text") {
			document.forms.speed.elements[cnt].value = "";
		}
	} 


	if (document.forms.speed.nsp.value.toString()==""&&document.forms.speed.ntd.value.toString()>""&&document.forms.speed.otd.value.toString()>""&&document.forms.speed.osp.value.toString()>"") {
	   document.forms.speed.nsp.value = Math.round(((document.forms.speed.ntd.value.toString()/document.forms.speed.otd.value.toString())*document.forms.speed.osp.value.toString())*10)/10;
       return;
	}


	if (document.forms.speed.osp.value.toString()==""&&document.forms.speed.ntd.value.toString()>""&&document.forms.speed.otd.value.toString()>""&&document.forms.speed.nsp.value.toString()>"") {
	   document.forms.speed.osp.value = Math.round(((document.forms.speed.otd.value.toString()/document.forms.speed.ntd.value.toString())*document.forms.speed.nsp.value.toString())*10)/10;
       return;
	}


	if (document.forms.speed.ntd.value.toString()==""&&document.forms.speed.osp.value.toString()>""&&document.forms.speed.otd.value.toString()>""&&document.forms.speed.nsp.value.toString()>"") {
	   document.forms.speed.ntd.value = Math.round(((document.forms.speed.nsp.value.toString()/document.forms.speed.osp.value.toString())*document.forms.speed.otd.value.toString())*10)/10;
       return;
	}


	if (document.forms.speed.otd.value.toString()==""&&document.forms.speed.osp.value.toString()>""&&document.forms.speed.ntd.value.toString()>""&&document.forms.speed.nsp.value.toString()>"") {
	   document.forms.speed.otd.value = Math.round(((document.forms.speed.osp.value.toString()/document.forms.speed.nsp.value.toString())*document.forms.speed.ntd.value.toString())*10)/10;
       return;
	}
}


 -->