var fDesc=new Array(); fDesc[0] = "This program was created for ease solving tasks of descriptive geometry. Main principle is: user writes procedure (algorithm) and program makes drawing after this procedure. Procedure is written in programming language derived from language C. This language was modified to be suitable for solving of tasks of descriptive geometry.
There are many advantages contrary to hand drawing:
* accuracy, all calculations are based on analytical geometry and are count with high precision
* speed, procedure is drawn in a few moments
* flexibility, everything can be changed, the change of one point change all point in relation to
* writing complex algorithms in programming language
* fast orientation in complicated drawings"; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }