javascript - JS: output inconsistencies -


This code receives the user input and takes it to the location of "selected", e.g. < P> 1 input
User input: 

  Apple   
 process (what happens inside):  
  "Img2 /" + + Apple + ".jpg";   
 Output:  
  Apple.jpg (image)   
 The problem once user inputs a query  
  orange   
 process (what happens inside) is not compatible image code, outputs to the previous one  
 2 input user input:  
  Is):  
  "img2 /" + + apple + ".jpg";   
 Output:  
  Apple.jpg (image) // wrong false var q = document.getElementById ("code"); If (q.selectedIndex & gt; 0) {var selected = q.options [q.selectedIndex] .value; Var src = "img2" "+ selected +" .jpg "; var img = document.getElementById (" placeholderIMG "); Img.src = src; Img.style.display =" inline ";} & lt; select name = "Code" id = "code" size = "" disabled = "true" hidden = "true" & gt; option value = "apple"> apple  gt; & lt; Option value = "acne"> acetus  gtc: // so far more and more   
 How can I fix it?   
 
 returns its mistake within the line  
  if (q.select indices> gt; 0)   
  selected index  The property is  0  when the first row is selected ("apple" in your case). For this, if the statement only does something other than "Apple", then it will work.  selectedIndex  is the property  -1  when no one is selected, then  not !  
 Should be changed with the statement:  
  if (q.selectedIndex> 1)

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