i had an interesting problem with this source xml.
this does not read in Ejs 4.1-4.2-4.3.
i tried Ejs 3.47 and it manages to load but with some error in the variables.
i clean up the variables and remove middle " in the Frame which is causing problem to the editor in Ejs 4.1-4.2-4.3.

now it is works after i open using Ejs 4.1-4.2-4.3.
almost lost this applet codes, then i have to updo again, lucky my method saved the xml.

while re looking at the applet, i am learning that i didn't remember this!
i am very impressed by this code
[code]// for autoscale drawing
if(xxmax || y>ymax){
xmin*=1.2; //xmin = xmin*1.2;
xmax*=1.2;
ymin*=1.2;
ymax*=1.2; // preserve the square look for x and y if the multiplier is the same 1.2
}[/code]
i will use it in my projectile motion applet soon