function Mod10(ccNumb) {  // v2.0
		var valid = "0123456789"  // Valid digits in a credit card number
		var len = ccNumb.length;  // The length of the submitted cc number
		var iCCN = parseInt(ccNumb);  // integer of ccNumb
		var sCCN = ccNumb.toString();  // string of ccNumb
		sCCN = sCCN.replace (/^\s+|\s+$/g,'');  // strip spaces
		var iTotal = 0;  // integer total set at zero
		var bNum = true;  // by default assume it is a number
		var bResult = false;  // by default assume it is NOT a valid cc
		var temp;  // temp variable for parsing string
		var calc;  // used for calculation of each digit
		
		// Determine if the ccNumb is in fact all numbers
		for (var j=0; j<len; j++) {
			temp = "" + sCCN.substring(j, j+1);
			if (valid.indexOf(temp) == "-1"){bNum = false;}
		}
		
		if (sCCN.substring(0,1) != '3' && sCCN.substring(0,1) != '4' && sCCN.substring(0,1) != '5') {
			bResult = false;
		}
		// if it is NOT a number, you can either alert to the fact, or just pass a failure
		if(!bNum) {
			bResult = false;
		}
		// Determine if it is the proper length 
		if((len == 0)&&(bResult)) {  // nothing, field is blank AND passed above # check
			bResult = false;
		}
		else {  // ccNumb is a number and the proper length - let's see if it is a valid card number
			if(len >= 15) {  // 15 or 16 for Amex or V/MC
				for(var i=len;i>0;i--) {  // LOOP throught the digits of the card
					calc = parseInt(iCCN) % 10;  // right most digit
					calc = parseInt(calc);  // assure it is an integer
					iTotal += calc;  // running total of the card number as we loop - Do Nothing to first digit
					i--;  // decrement the count - move to the next digit in the card
					iCCN = iCCN / 10;                               // subtracts right most digit from ccNumb
					calc = parseInt(iCCN) % 10 ;    // NEXT right most digit
					calc = calc *2;                                 // multiply the digit by two
					// Instead of some screwy method of converting 16 to a string and then parsing 1 and 6 and then adding them to make 7,
					// I use a simple switch statement to change the value of calc2 to 7 if 16 is the multiple.
					switch(calc) {
						case 10: calc = 1; break;       //5*2=10 & 1+0 = 1
						case 12: calc = 3; break;       //6*2=12 & 1+2 = 3
						case 14: calc = 5; break;       //7*2=14 & 1+4 = 5
						case 16: calc = 7; break;       //8*2=16 & 1+6 = 7
						case 18: calc = 9; break;       //9*2=18 & 1+8 = 9
						default: calc = calc;           //4*2= 8 &   8 = 8  -same for all lower numbers
					}
					iCCN = iCCN / 10;  // subtracts right most digit from ccNum
					iTotal += calc;  // running total of the card number as we loop
				}  // END OF LOOP
				if ((iTotal%10)==0) {  // check to see if the sum Mod 10 is zero
					bResult = true;  // This IS (or could be) a valid credit card number.
				}
				else {
					bResult = false;  // This could NOT be a valid credit card number
				}
			}
		}
		return bResult; // Return the results
	}