function checkyear() {
	if (document.getElementById('modelyearfrom').value>0 && document.getElementById('modelyearto').value>0) { 
		if (document.getElementById('modelyearfrom').value>document.getElementById('modelyearto').value) { 
			document.getElementById('modelyearto').selectedIndex=0;
			alert ("Your TO year is greater than your FROM year.  Please select a year later than "+document.getElementById('modelyearfrom').value+" to continue.")
		}
	}
}

function checkmiles() {
	if (document.getElementById('mileagefrom').value>0 && document.getElementById('mileageto').value>0) { 
		if (document.getElementById('mileagefrom').value>document.getElementById('mileageto').value) { 
			document.getElementById('mileageto').value="";
			document.getElementById('mileageto').setfocus;
			alert ("Your mileage range is incorrect.  Please enter mileage larger than "+document.getElementById('mileagefrom').value+" to continue.")
		}
	}
}

function checkprices() {
	if (document.getElementById('pricefrom').value>0 && document.getElementById('priceto').value>0) { 
		if (document.getElementById('pricefrom').value>document.getElementById('priceto').value) { 
			document.getElementById('priceto').value="";
			document.getElementById('priceto').setfocus;
			alert ("Your pricing range is incorrect.  Please enter a price larger than $"+document.getElementById('pricefrom').value+" to continue.")
		}
	}
}