function bmiCalc(form) {
        var weight = Number(form.wt.value);
    var height = Number(form.ht.value);
    if (!checkNum(weight,"'Kilo'")) {
        form.wt.select();
        form.wt.focus();
        return false
    }
    if (!checkNum(height,"'Boy'")) {
        form.ht.select();
        form.ht.focus();
        return false
    }
        if (form.wu.selectedIndex == 0) {
                                        //  What units for weight?
                                        //  0 = lbs
                                        //  1 = kg
                weight = weight * 0.45359237;    //  Convert wt (lbs to kg)
        }
        if (form.sex[1].checked) {      //  Is the patient female?
                                        //  0 = male
                                        //  1 = female
        leanConvert = 148;
        idealConvert = 45.5;    //  conversion factors for women
        } else {
        leanConvert = 128;
        idealConvert = 50;    //  conversion factors for men
    }
    if (form.hu.selectedIndex == 0) {  
                //  if height units are "inches"
        heightInches = height;
        heightMeters = height * 2.54 / 100;
    }
    if (form.hu.selectedIndex == 1) {  
                //  if height units are "cm"
        heightInches = height / 2.54;
        heightMeters = height / 100;
    }
    if (form.hu.selectedIndex == 2) {  
                //  if height units are "meters"
        heightInches = height * 100 / 2.54;
        heightMeters = height;
    }
    var bsa = 0.20247 * Math.pow(heightMeters,0.725) *
        Math.pow(weight,0.425);
    var leanKg = 1.1 * weight - leanConvert * (Math.pow(weight,2) / 
        Math.pow((100 * heightMeters),2));
    var leanLbs = leanKg * 2.2046226;
    var idealKg = idealConvert + 2.3 * (heightInches - 60);
    var idealLbs = idealKg * 2.2046226;
    var bmi = weight / Math.pow(heightMeters,2);
    bsa = rounding(bsa,2);
    leanKg = Math.round(leanKg);
    leanLbs = Math.round(leanLbs);
    idealKg = Math.round(idealKg);
    idealLbs = Math.round(idealLbs);
    bmi = rounding(bmi,1);
    if (bmi < 18.5) {
        var interp = "ideal kilonuzun altinda"
    } else {
        if (bmi < 25.0) {
            var interp = "Normalsiniz"
        } else {
            if (bmi < 30.0) {
                var interp = "ideal Kilonuzun ustunde"
            } else {
                var interp = "Acil Diyet uyarisi"
            }
        }
    }
        form.bsa.value = bsa;
        form.leanKg.value = leanKg;
    form.leanLbs.value = leanLbs;
        form.idealKg.value = idealKg;
    form.idealLbs.value = idealLbs;
        form.bmi.value = bmi;
    form.interp.value = interp;
    return true
}
function checkNum(val,text) {
        if ((val == null) || (isNaN(val)) || (val == "") || (val < 0)) {
        alert("Lütfen bu alani doldurunuz " + text + ".");
                return false
        }
        return true;
}
function rounding(number,decimal) {
    multiplier = Math.pow(10,decimal);
    number = Math.round(number * multiplier) / multiplier;
        return number
}



var Url = {
 
	// public method for url encoding
	encode : function (string) {
		return escape(this._utf8_encode(string));
	},
 
	// public method for url decoding
	decode : function (string) {
		return this._utf8_decode(unescape(string));
	},
 
	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";
 
		for (var n = 0; n < string.length; n++) {
 
			var c = string.charCodeAt(n);
 
			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
 
		}
 
		return utftext;
	},
 
	// private method for UTF-8 decoding
	_utf8_decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;
 
		while ( i < utftext.length ) {
 
			c = utftext.charCodeAt(i);
 
			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
 
		}
 
		return string;
	}
 
}