this is the code i used to display image in the header. the problem i have is i want to use a variable for the image, when i put the variable name instead of the image name i get an error:

Microsoft JScript runtime error '800a138f'

'undefined' is null or not an object

/EKtestdb/fpdf/fpdf/includes/Basics.asp, line 121

    this.Header=function Header() 
  { 
  this.SetY (10) 
  this.SetFont ("Times","",10) 
  //this.Cell (45,5, "HEADER", 0, 0, "L") 
  this.SetFont ("Times","b",14) 
  //this.Cell (190,5, this.title, 0, 0, "C") 
  this.Cell (190,20, this.title, 0, 0) 
  this.SetFont ("Times","",10) 
  this.Image('logoSM1.jpg',165,3,33) 
  this.Image( techpic ,165,3,33)

this is the code for basics.asp line 121:

this.strrpos=function strrpos(s,ch){ 
 res = s.lastIndexOf(ch) 
 if (res>0-1){return res}else{return false} 
} 
this.strpos=function strpos(s,ch,start){ 
 if (arguments.length<3){start=0} 
 res = s.indexOf(ch,start); 
 if (res>-1){return res}else{return false} 
}

if you just want to display an image this line should work:

this.Image('logoSM1.jpg',165,3,33)

but for using a variable instead of image name can someone help with this?