//Author: E.Kirubakaran

// To check the whitespace
function isWhitespace(s)
{   
	var ss = s.value;
	var len = ss.length;
	var i;
	var j=0;
	var flag = true;
	 if (isEmpty(s) == false)
    	{
	        for (i = 0; i < s.value.length; i++)
	        {   
	    	    var c = s.value.charAt(i);
    		    if(c == " "){j=j+1;}
            }
         	if(j == len)
		    {
		    alert("Please enter a valid input")	   
		    s.select();
		    flag=true;
		    }
		    else flag = false;
	    }
	    
    return flag;
}

// To check the field is empty
function isEmpty(theField)
	{
		if(theField.value == "")
		return true;
		else
		return false;	
	}

// To check the field is empty in comboBox
function isEmpty1(theField)
	{
	if(theField.options[theField.selectedIndex].value == "")
		return true;
		else
		return false;	
	}		


// To check valid email ID

function check_email(obj)
{
var flag = false;
if(!isEmpty(obj))
{
var ob = obj.value;
var len = ob.length;
for(i=0;i<=ob.length;i++)
	{
		if(ob.charAt(i) == '@') 
		{
		  if(i == 0 || i == len-1)break;
		  for(j=0;j<=ob.length;j++)
          		{
		        	if(ob.charAt(j) == '.') 
     				{
 		         	  if(j == 0 || j == len-1)break;
				  flag = true;
                       		  break;
				}
			}
		}
	}	
	if(!flag)
		{
		alert("Please enter the proper email ID");
		obj.value="";
		obj.focus();
		}
}
return flag;
}


// Check length
function check_length(obj,len)
{
var flag = true;
if(!isEmpty(obj))
{
var ob = obj.value;
	if(ob.length >= len)
	{
    	alert("Field length must be less than "+len);
	    obj.value = "";
	    obj.focus();	
	    flag = false;	
    	}
}
return flag;	
}


// To check valid Numeric with positive value.
function check_num(obj)
{
var flag = true;
if(!isEmpty(obj))
{
var ob = obj.value;
	if(!parseInt(ob,10))
	{
	alert("Please enter a positive number");
	obj.value = "";
	obj.focus();
	flag = false;
	}
	else
	{
		for(i=0;i<=ob.length;i++)
		{
			if(ob.charAt(i) >= 0) 
			{
				if(!(ob.charAt(i) <= 9)) 
				{
				alert("Please enter a positive number");
				obj.value = "";
				obj.focus();
				flag = false;break;
				}
			}
			else
			{
			alert("Please enter a positive number");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
		}
	}
}
return flag;	
}

// Returns true if character c is a alphabet 
// (a .. z/A .. Z).

function isLetter (c)
{   return ( ((c >= "a") && (c <= "z")) || ((c >= "A") && (c <= "Z")) )
}

// Returns true if character c is a digit 
// (0 .. 9).

function isDigit (c)
{   return ((c >= "0") && (c <= "9"))
}

function check_PostalCode(obj)
{
var flag = true;
var ob = obj.value;
	if(!isEmpty(obj))
	{
		for(i=0;i<ob.length;i++)
		{
		 var c = ob.charAt(i);	
		 if (! (isLetter(c) || isDigit(c) ) )
			{
			alert("Please enter the postal code");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
		}
	}	
return flag;	
}


// To check valid Numeric value with Decimal.
function check_float(obj)
{
var flag = true;
var ob = obj.value;
var dotcount=0;

	if(!isEmpty(obj))
	{
		for(i=0;i<ob.length;i++)
		{
		 var c = ob.charAt(i);	
		 if(c == '.'){dotcount = dotcount+1;}		 

		 if (! isDigit(c) )
		  {
		    if(c != '.')
		    {
			alert("Please enter a positive number");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
			if( dotcount > 1 )
			{
			alert("Please enter a positive number");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
		  }
          
          if(i > 7 && c != '.')
			{
			alert("Please enter a number less than 100000000");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
			
		  if(i > 8 && c == '.')
			{
			alert("Please enter a number less than 100000000");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
		}
	}	
return flag;	
}



// To check valid Numeric value with positive value.
function checkmaxwithzero(obj)
{
var flag = true;
var ob = obj.value;
	if(!isEmpty(obj))
	{
		for(i=0;i<ob.length;i++)
		{
		 var c = ob.charAt(i);	
		 if (! isDigit(c)  )
			{
			alert("Please enter a positive number");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
		}
	}	
return flag;	
}

// to validate the postal code ie. postal code must be 5 digit and must be a positive number.

function check_Postal(obj)
{
var flag = true;
if(!isEmpty(obj))
{
var ob = obj.value;
	if(!parseInt(ob,10))
	{
	alert("Please enter a positive number");
	obj.value = "";
	obj.focus();
	flag = false;
	}

	else
	{
		for(i=0;i<=ob.length;i++)
		{
			if(ob.length !=5)
			{
				alert("Please enter a 5 digit valid postal code");
				obj.value = "";
				obj.focus();
				flag = false;break;
			}

			else if(ob.charAt(i) >= 0) 
			{
				if(!(ob.charAt(i) <= 9)) 
				{
				alert("Please enter a positive number");
				obj.value = "";
				obj.focus();
				flag = false;break;
				}
			}
			else
			{
			alert("Please enter a positive number");
			obj.value = "";
			obj.focus();
			flag = false;break;
			}
		}
	}
}
return flag;	
}